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ManualsBrandsLinear Technology ManualsDC / DC Adjustable Switching RegulatorsSwitching Regulator IC Step-Down BGA-600 ... 5.5V
27282930313233343536
LTM4644/LTM4644-1
32
Rev. F
For more information www.analog.com
TYPICAL APPLICATIONS
Figure 38. LTM4644-1 Together with LTC2975, 4.5V to 14V Input, 3.3V, 2.5V, 1.5V, 1V
Output at 4A Each with Input and Output Voltage, Current and Temperature Telemetry.
19.1k
10.0m
60.4k
1k
0.1µF
0.1µF
0.1µF
100Ω
100Ω
10nF 10nF
47µF
10.0k
1k
10nF
V
OUT2
2.5V/4A
40.2k
10.0m
60.4k
1k
0.1µF
100Ω
100Ω
10nF 10nF
47µF
10.0k
1k
10nF
V
OUT3
1.5V/4A
90.9k
10.0m
60.4k
1k
0.1µF
100Ω
100Ω
10nF 10nF
47µF
10.0k
1k
10nF
V
OUT4
1.0V/4A
13.3k
10.0m10.0m
TEMP
CLKOUTCLKIN
FB1
FB2
FB3
60.4k60.4k60.4k
FB4
RUN1
RUN2
RUN3
RUN4
MODE4
PGOOD4
PGOOD3
PGOOD2
PGOOD1
COMP1
COMP2
COMP3
COMP4
TRACK/SS1
TRACK/SS2
TRACK/SS3
TRACK/SS4
LTM4644-1
MODE3
MODE2
MODE1
GNDSGND
V
OUT1
V
OUT2
V
OUT3
V
OUT1
V
OUT2
V
OUT3
INTV
CC4
INTV
CC2
INTV
CC3
SV
IN4
SV
IN3
SV
IN2
V
IN4
V
IN
4.5V TO 14V
V
IN3
V
IN2
INTV
CC1
SV
IN1
V
IN1
V
OUT4
60.4k
1k
0.1µF
100Ω
100Ω
10nF 10nF
47µF
10.0k
1k
10nF
U6
TSENSE0
TSENSE1
TSENSE2
TSENSE3
VPWR
VIN_SNS
VIN_SNS_CAP
WDI/RESETB
PWRGD
LTC2975
AUXFAULTB
SHARE_CLK
FAULTB0
FAULTB1
SCL
SDA
ALERTB
CONTROL0
CONTROL1
CONTROL2
CONTROL3
ASEL0
ASEL1
WP
REFP
REFM
IIN_SNSP
IIN_SNSM
ISENSEP0
ISENSEM0
VSENSEP0
ISENSEP1
ISENSEM2
VSENSEM2
ISENSEP2
ISENSEP3
VSENSEP3
VSENSEM3
ISENSEM3
ISENSEM1
VSENSEM1
VSENSEP2
VSENSEP1
VSENSEM0
CHANNEL 0
VDAC0
VDAC1
VDAC2
VDAC3
GND
0.1µF 0.1µF
10k
4644 F38
10k 10k 10k 10k 10k 10k 10k 10k 10k 10k
V
DD25
V
DD33
19 14 12
VOUT_EN0
VOUT_EN1
VOUT_EN2
VOUT_EN3
V
OUT1
3.3V/4A
0.1µF
40.2k
0.1µF
19.1k13.3k
CHANNEL 1CHANNEL 2CHANNEL 3
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